/*
 * Copyright (C) 2008-2008 LeGACY <http://www.legacy-project.org/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef __LEGACY_GRIDDEFINES_H
#define __LEGACY_GRIDDEFINES_H

#include "Common.h"
#include "GameSystem/NGrid.h"
#include <cmath>

// Forward class definitions
class Corpse;
class Creature;
class DynamicObject;
class GameObject;
class Pet;
class Player;

#define MAX_NUMBER_OF_GRIDS      64

//#define SIZE_OF_GRIDS            533.33333f
#define SIZE_OF_GRIDS            5000
#define CENTER_GRID_ID           (MAX_NUMBER_OF_GRIDS/2)

#define CENTER_GRID_OFFSET       (SIZE_OF_GRIDS/2)

#define MIN_GRID_DELAY           60*1000

//#define MAX_NUMBER_OF_CELLS      8
#define MAX_NUMBER_OF_CELLS      1
#define SIZE_OF_GRID_CELL        (SIZE_OF_GRIDS/MAX_NUMBER_OF_CELLS)

//#define CENTER_GRID_CELL_ID      256
#define CENTER_GRID_CELL_ID      0
#define CENTER_GRID_CELL_OFFSET  (SIZE_OF_GRID_CELL/2)

#define TOTAL_NUMBER_OF_CELLS_PER_MAP (MAX_NUMBER_OF_GRIDS*MAX_NUMBER_OF_CELLS)

//#define MAP_RESOLUTION 256
#define MAP_RESOLUTION 256

#define MAP_SIZE                 (SIZE_OF_GRIDS*MAX_NUMBER_OF_GRIDS)
#define MAP_HALFSIZE             (MAP_SIZE/2)

// Creature used instead pet to simplify *::Visit templates (not required duplicate code for Create->Pet case)
typedef TYPELIST_3(Player, Creature/*pets*/, Corpse/*resurrectable*/)
//typedef TYPELIST_2(Player, GameObject)
		AllWorldObjectTypes;
typedef TYPELIST_4(GameObject, Creature/*except pets*/, DynamicObject, Corpse/*Bones*/)
//typedef TYPELIST_2(Creature /*except pets*/, GameObject)
		AllGridObjectTypes;

typedef GridRefManager<Corpse>        CorpseMapType;
typedef GridRefManager<Creature>      CreatureMapType;
typedef GridRefManager<DynamicObject> DynamicObjectMapType;
typedef GridRefManager<GameObject>    GameObjectMapType;
typedef GridRefManager<Player>        PlayerMapType;


typedef Grid<Player, AllWorldObjectTypes, AllGridObjectTypes> GridType;
typedef NGrid<8, Player, AllWorldObjectTypes, AllGridObjectTypes> NGridType;

typedef TypeMapContainer<AllGridObjectTypes> GridTypeMapContainer;
typedef TypeMapContainer<AllWorldObjectTypes> WorldTypeMapContainer;

template<const unsigned int LIMIT>
struct LEGACY_DLL_DECL CoordPair
{
	CoordPair(uint32 x=0, uint32 y=0) : x_coord(x), y_coord(y) {}
	CoordPair(const CoordPair<LIMIT> &obj) : x_coord(obj.x_coord), y_coord(obj.y_coord) {}
	bool operator==(const CoordPair<LIMIT> &obj) const { return (obj.x_coord == x_coord && obj.y_coord == y_coord); }
	bool operator!=(const CoordPair<LIMIT> &obj) const { return !operator==(obj); }

	CoordPair<LIMIT>& operator=(const CoordPair<LIMIT> &obj)
	{
		x_coord = obj.x_coord;
		y_coord = obj.y_coord;
		return *this;
	}

	void operator<<(const uint32 val)
	{
		if( x_coord+val < LIMIT )
			x_coord += val;
	}

	void operator>>(const uint32 val)
	{
		if( x_coord+val < LIMIT )
			x_coord += val;
	}

	void operator-=(const uint32 val)
	{
		if( y_coord >= val )
			y_coord -= val;
	}

	void operator+=(const uint32 val)
	{
		if( y_coord+val < LIMIT )
			y_coord += val;
	}

	uint32 x_coord;
	uint32 y_coord;
};

typedef CoordPair<MAX_NUMBER_OF_GRIDS> GridPair;
typedef CoordPair<TOTAL_NUMBER_OF_CELLS_PER_MAP> CellPair;

namespace LeGACY
{
	template<class RET_TYPE, int CENTER_VAL>
		inline RET_TYPE Compute(float x, float y, float center_offset, float size)
	{
		// calculate and store temporary values in double format for having some result as same mySQL calculations
		double x_offset = (double(x) - center_offset)/size;
		double y_offset = (double(y) - center_offset)/size;

		int x_val = int(x_offset+CENTER_VAL + 0.5);
		int y_val = int(y_offset+CENTER_VAL + 0.5);
		return RET_TYPE(x_val, y_val);
	}

	inline GridPair ComputeGridPair(float x, float y)
	{
		return Compute<GridPair, CENTER_GRID_ID>(x, y, CENTER_GRID_OFFSET, SIZE_OF_GRIDS);
	}

	inline CellPair ComputeCellPair(float x, float y)
	{
		return Compute<CellPair, CENTER_GRID_CELL_ID>(x, y, CENTER_GRID_CELL_OFFSET, SIZE_OF_GRID_CELL);
	}

	inline void NormalizeMapCoord(float &c)
	{
		if(c > MAP_HALFSIZE - 0.5)
			c = MAP_HALFSIZE - 0.5;
		else if(c < -(MAP_HALFSIZE - 0.5))
			c = -(MAP_HALFSIZE - 0.5);
	}

	inline bool IsValidMapCoord(float c)
	{
		return finite(c) && (std::fabs(c) < MAP_HALFSIZE - 0.5);
	}

	inline bool IsValieMapCoord(float x, float y)
	{
		return IsValidMapCoord(x) && IsValidMapCoord(y);
	}
}
#endif
